As electric vehicles are paid attention to and recognized by more and more people, supporting facilities not only require charging piles but also charging guns. Charging guns are the charging interfaces of electric vehicles. The DC charging gun includes two parts: smart connectors and charging cables, involving knowledge of machinery, electronics, communications, materials, electrical, ergonomics and other disciplines, covering molding, injection molding, machinery, electronics, assembly and testing, etc. Process, is a highly integrated product. The design inspiration of this DC charging gun comes from speed. Through the running of animals, the shape curve of people when running, and through abstract and associative design methods, it is designed with smooth and rhythmic lines, giving it the connotation of technology, streamline and fashion in appearance. The handle of the charging gun has a moderate grip diameter, and it will feel more comfortable to use. It is not only very safe and convenient to use, safety is also guaranteed. The design of the DC charging gun adopts the integrated design of the shell, the two-color injection molding and the sealing structure design, which is waterproof, anti-leakage, durable, safe and reliable; the wavy design of the inner surface of the handle, the process is exquisite, and it has a large friction force., Convenient for users to hold, not easy to fall off, and comfortable to hold; a special protective cover is designed at the charging interface, which is convenient, it can extend the service life of the charging gun. The DC charging gun is also equipped with an electronic lock device. The electronic lock on the charging gun is different from the electronic lock in traditional industries. In terms of performance, it requires detectability, high reliability and applicability; in terms of structure, it requires small space size, low power consumption and seamless connection of charging sockets, which is convenient for installation and maintenance.